ceremonyclient/go-libp2p/p2p/host/resource-manager/stats.go

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2023-08-21 03:50:38 +00:00
package rcmgr
import (
"strings"
"github.com/libp2p/go-libp2p/p2p/metricshelper"
"github.com/prometheus/client_golang/prometheus"
)
const metricNamespace = "libp2p_rcmgr"
var (
// Conns
conns = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricNamespace,
Name: "connections",
Help: "Number of Connections",
}, []string{"dir", "scope"})
connsInboundSystem = conns.With(prometheus.Labels{"dir": "inbound", "scope": "system"})
connsInboundTransient = conns.With(prometheus.Labels{"dir": "inbound", "scope": "transient"})
connsOutboundSystem = conns.With(prometheus.Labels{"dir": "outbound", "scope": "system"})
connsOutboundTransient = conns.With(prometheus.Labels{"dir": "outbound", "scope": "transient"})
oneTenThenExpDistributionBuckets = []float64{
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 32, 64, 128, 256,
}
// PeerConns
peerConns = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "peer_connections",
Buckets: oneTenThenExpDistributionBuckets,
Help: "Number of connections this peer has",
}, []string{"dir"})
peerConnsInbound = peerConns.With(prometheus.Labels{"dir": "inbound"})
peerConnsOutbound = peerConns.With(prometheus.Labels{"dir": "outbound"})
// Lets us build a histogram of our current state. See https://github.com/libp2p/go-libp2p-resource-manager/pull/54#discussion_r911244757 for more information.
previousPeerConns = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "previous_peer_connections",
Buckets: oneTenThenExpDistributionBuckets,
Help: "Number of connections this peer previously had. This is used to get the current connection number per peer histogram by subtracting this from the peer_connections histogram",
}, []string{"dir"})
previousPeerConnsInbound = previousPeerConns.With(prometheus.Labels{"dir": "inbound"})
previousPeerConnsOutbound = previousPeerConns.With(prometheus.Labels{"dir": "outbound"})
// Streams
streams = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricNamespace,
Name: "streams",
Help: "Number of Streams",
}, []string{"dir", "scope", "protocol"})
peerStreams = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "peer_streams",
Buckets: oneTenThenExpDistributionBuckets,
Help: "Number of streams this peer has",
}, []string{"dir"})
peerStreamsInbound = peerStreams.With(prometheus.Labels{"dir": "inbound"})
peerStreamsOutbound = peerStreams.With(prometheus.Labels{"dir": "outbound"})
previousPeerStreams = prometheus.NewHistogramVec(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "previous_peer_streams",
Buckets: oneTenThenExpDistributionBuckets,
Help: "Number of streams this peer has",
}, []string{"dir"})
previousPeerStreamsInbound = previousPeerStreams.With(prometheus.Labels{"dir": "inbound"})
previousPeerStreamsOutbound = previousPeerStreams.With(prometheus.Labels{"dir": "outbound"})
// Memory
memoryTotal = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricNamespace,
Name: "memory",
Help: "Amount of memory reserved as reported to the Resource Manager",
}, []string{"scope", "protocol"})
// PeerMemory
peerMemory = prometheus.NewHistogram(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "peer_memory",
Buckets: memDistribution,
Help: "How many peers have reserved this bucket of memory, as reported to the Resource Manager",
})
previousPeerMemory = prometheus.NewHistogram(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "previous_peer_memory",
Buckets: memDistribution,
Help: "How many peers have previously reserved this bucket of memory, as reported to the Resource Manager",
})
// ConnMemory
connMemory = prometheus.NewHistogram(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "conn_memory",
Buckets: memDistribution,
Help: "How many conns have reserved this bucket of memory, as reported to the Resource Manager",
})
previousConnMemory = prometheus.NewHistogram(prometheus.HistogramOpts{
Namespace: metricNamespace,
Name: "previous_conn_memory",
Buckets: memDistribution,
Help: "How many conns have previously reserved this bucket of memory, as reported to the Resource Manager",
})
// FDs
fds = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricNamespace,
Name: "fds",
Help: "Number of file descriptors reserved as reported to the Resource Manager",
}, []string{"scope"})
fdsSystem = fds.With(prometheus.Labels{"scope": "system"})
fdsTransient = fds.With(prometheus.Labels{"scope": "transient"})
// Blocked resources
blockedResources = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: metricNamespace,
Name: "blocked_resources",
Help: "Number of blocked resources",
}, []string{"dir", "scope", "resource"})
)
var (
memDistribution = []float64{
1 << 10, // 1KB
4 << 10, // 4KB
32 << 10, // 32KB
1 << 20, // 1MB
32 << 20, // 32MB
256 << 20, // 256MB
512 << 20, // 512MB
1 << 30, // 1GB
2 << 30, // 2GB
4 << 30, // 4GB
}
)
func MustRegisterWith(reg prometheus.Registerer) {
metricshelper.RegisterCollectors(reg,
conns,
peerConns,
previousPeerConns,
streams,
peerStreams,
previousPeerStreams,
memoryTotal,
peerMemory,
previousPeerMemory,
connMemory,
previousConnMemory,
fds,
blockedResources,
)
}
func WithMetricsDisabled() Option {
return func(r *resourceManager) error {
r.disableMetrics = true
return nil
}
}
// StatsTraceReporter reports stats on the resource manager using its traces.
type StatsTraceReporter struct{}
func NewStatsTraceReporter() (StatsTraceReporter, error) {
// TODO tell prometheus the system limits
return StatsTraceReporter{}, nil
}
func (r StatsTraceReporter) ConsumeEvent(evt TraceEvt) {
tags := metricshelper.GetStringSlice()
defer metricshelper.PutStringSlice(tags)
r.consumeEventWithLabelSlice(evt, tags)
}
// Separate func so that we can test that this function does not allocate. The syncPool may allocate.
func (r StatsTraceReporter) consumeEventWithLabelSlice(evt TraceEvt, tags *[]string) {
switch evt.Type {
case TraceAddStreamEvt, TraceRemoveStreamEvt:
if p := PeerStrInScopeName(evt.Name); p != "" {
// Aggregated peer stats. Counts how many peers have N number of streams open.
// Uses two buckets aggregations. One to count how many streams the
// peer has now. The other to count the negative value, or how many
// streams did the peer use to have. When looking at the data you
// take the difference from the two.
oldStreamsOut := int64(evt.StreamsOut - evt.DeltaOut)
peerStreamsOut := int64(evt.StreamsOut)
if oldStreamsOut != peerStreamsOut {
if oldStreamsOut != 0 {
previousPeerStreamsOutbound.Observe(float64(oldStreamsOut))
}
if peerStreamsOut != 0 {
peerStreamsOutbound.Observe(float64(peerStreamsOut))
}
}
oldStreamsIn := int64(evt.StreamsIn - evt.DeltaIn)
peerStreamsIn := int64(evt.StreamsIn)
if oldStreamsIn != peerStreamsIn {
if oldStreamsIn != 0 {
previousPeerStreamsInbound.Observe(float64(oldStreamsIn))
}
if peerStreamsIn != 0 {
peerStreamsInbound.Observe(float64(peerStreamsIn))
}
}
} else {
if evt.DeltaOut != 0 {
if IsSystemScope(evt.Name) || IsTransientScope(evt.Name) {
*tags = (*tags)[:0]
*tags = append(*tags, "outbound", evt.Name, "")
streams.WithLabelValues(*tags...).Set(float64(evt.StreamsOut))
} else if proto := ParseProtocolScopeName(evt.Name); proto != "" {
*tags = (*tags)[:0]
*tags = append(*tags, "outbound", "protocol", proto)
streams.WithLabelValues(*tags...).Set(float64(evt.StreamsOut))
} else {
// Not measuring service scope, connscope, servicepeer and protocolpeer. Lots of data, and
// you can use aggregated peer stats + service stats to infer
// this.
break
}
}
if evt.DeltaIn != 0 {
if IsSystemScope(evt.Name) || IsTransientScope(evt.Name) {
*tags = (*tags)[:0]
*tags = append(*tags, "inbound", evt.Name, "")
streams.WithLabelValues(*tags...).Set(float64(evt.StreamsIn))
} else if proto := ParseProtocolScopeName(evt.Name); proto != "" {
*tags = (*tags)[:0]
*tags = append(*tags, "inbound", "protocol", proto)
streams.WithLabelValues(*tags...).Set(float64(evt.StreamsIn))
} else {
// Not measuring service scope, connscope, servicepeer and protocolpeer. Lots of data, and
// you can use aggregated peer stats + service stats to infer
// this.
break
}
}
}
case TraceAddConnEvt, TraceRemoveConnEvt:
if p := PeerStrInScopeName(evt.Name); p != "" {
// Aggregated peer stats. Counts how many peers have N number of connections.
// Uses two buckets aggregations. One to count how many streams the
// peer has now. The other to count the negative value, or how many
// conns did the peer use to have. When looking at the data you
// take the difference from the two.
oldConnsOut := int64(evt.ConnsOut - evt.DeltaOut)
connsOut := int64(evt.ConnsOut)
if oldConnsOut != connsOut {
if oldConnsOut != 0 {
previousPeerConnsOutbound.Observe(float64(oldConnsOut))
}
if connsOut != 0 {
peerConnsOutbound.Observe(float64(connsOut))
}
}
oldConnsIn := int64(evt.ConnsIn - evt.DeltaIn)
connsIn := int64(evt.ConnsIn)
if oldConnsIn != connsIn {
if oldConnsIn != 0 {
previousPeerConnsInbound.Observe(float64(oldConnsIn))
}
if connsIn != 0 {
peerConnsInbound.Observe(float64(connsIn))
}
}
} else {
if IsConnScope(evt.Name) {
// Not measuring this. I don't think it's useful.
break
}
if IsSystemScope(evt.Name) {
connsInboundSystem.Set(float64(evt.ConnsIn))
connsOutboundSystem.Set(float64(evt.ConnsOut))
} else if IsTransientScope(evt.Name) {
connsInboundTransient.Set(float64(evt.ConnsIn))
connsOutboundTransient.Set(float64(evt.ConnsOut))
}
// Represents the delta in fds
if evt.Delta != 0 {
if IsSystemScope(evt.Name) {
fdsSystem.Set(float64(evt.FD))
} else if IsTransientScope(evt.Name) {
fdsTransient.Set(float64(evt.FD))
}
}
}
case TraceReserveMemoryEvt, TraceReleaseMemoryEvt:
if p := PeerStrInScopeName(evt.Name); p != "" {
oldMem := evt.Memory - evt.Delta
if oldMem != evt.Memory {
if oldMem != 0 {
previousPeerMemory.Observe(float64(oldMem))
}
if evt.Memory != 0 {
peerMemory.Observe(float64(evt.Memory))
}
}
} else if IsConnScope(evt.Name) {
oldMem := evt.Memory - evt.Delta
if oldMem != evt.Memory {
if oldMem != 0 {
previousConnMemory.Observe(float64(oldMem))
}
if evt.Memory != 0 {
connMemory.Observe(float64(evt.Memory))
}
}
} else {
if IsSystemScope(evt.Name) || IsTransientScope(evt.Name) {
*tags = (*tags)[:0]
*tags = append(*tags, evt.Name, "")
memoryTotal.WithLabelValues(*tags...).Set(float64(evt.Memory))
} else if proto := ParseProtocolScopeName(evt.Name); proto != "" {
*tags = (*tags)[:0]
*tags = append(*tags, "protocol", proto)
memoryTotal.WithLabelValues(*tags...).Set(float64(evt.Memory))
} else {
// Not measuring connscope, servicepeer and protocolpeer. Lots of data, and
// you can use aggregated peer stats + service stats to infer
// this.
break
}
}
case TraceBlockAddConnEvt, TraceBlockAddStreamEvt, TraceBlockReserveMemoryEvt:
var resource string
if evt.Type == TraceBlockAddConnEvt {
resource = "connection"
} else if evt.Type == TraceBlockAddStreamEvt {
resource = "stream"
} else {
resource = "memory"
}
scopeName := evt.Name
// Only the top scopeName. We don't want to get the peerid here.
// Using indexes and slices to avoid allocating.
scopeSplitIdx := strings.IndexByte(scopeName, ':')
if scopeSplitIdx != -1 {
scopeName = evt.Name[0:scopeSplitIdx]
}
// Drop the connection or stream id
idSplitIdx := strings.IndexByte(scopeName, '-')
if idSplitIdx != -1 {
scopeName = scopeName[0:idSplitIdx]
}
if evt.DeltaIn != 0 {
*tags = (*tags)[:0]
*tags = append(*tags, "inbound", scopeName, resource)
blockedResources.WithLabelValues(*tags...).Add(float64(evt.DeltaIn))
}
if evt.DeltaOut != 0 {
*tags = (*tags)[:0]
*tags = append(*tags, "outbound", scopeName, resource)
blockedResources.WithLabelValues(*tags...).Add(float64(evt.DeltaOut))
}
if evt.Delta != 0 && resource == "connection" {
// This represents fds blocked
*tags = (*tags)[:0]
*tags = append(*tags, "", scopeName, "fd")
blockedResources.WithLabelValues(*tags...).Add(float64(evt.Delta))
} else if evt.Delta != 0 {
*tags = (*tags)[:0]
*tags = append(*tags, "", scopeName, resource)
blockedResources.WithLabelValues(*tags...).Add(float64(evt.Delta))
}
}
}